Alright, let's work through 6203 times 1999 step by step
6203 × 1999 = 1999 × (6203)
+ 1999 × 3 that results in 5997
+ 1999 × 00 producing 0
+ 1999 × 200 yielding 399800
+ 1999 × 6000 yielding 11994000

= 12399797
